| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
Comprehensive Evaluation of the Degradation of Duplex Stainless Steels in Light Water Reactor Systems |
| Author(s) |
Timothy G. Lach, Shawn Riechers, David Collins, William Frazier, Arun Devaraj, Emily Barkley, Thak Sang Byun |
| On-Site Speaker (Planned) |
Timothy G. Lach |
| Abstract Scope |
Multicomponent alloys like cast austenitic stainless steels (CASSs) with a duplex phase structure allow for the investigation of interdependent microstructural evolution mechanisms during thermal aging or irradiation, where simpler model systems may not show the co-dependency of different evolution pathways. We aim to provide a comprehensive knowledge base for the integrity assessment of CASS components for extended operations in nuclear power systems, with a focus on degradation mechanisms in multiple alloys at reactor-relevant temperatures of 290-400°C up to 30,000 hours. A comprehensive evaluation of the microstructural and mechanical behavior evolution of the ferrite and austenite was conducted. The microstructure was studied using atom probe tomography and electron microscopy. The mechanical behavior was investigated on two scales: on the bulk scale using tensile, Charpy impact, and fracture toughness testing, and on the nanoscale using relative hardness mapping via atomic force microscopy. The results were further interpreted by kinetic Monte Carlo simulation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |